“Apple is reducing the price of an out-of-warranty iPhone battery replacement by $50 — from $79 to $29 — for anyone with an iPhone 6 or later whose battery needs to be replaced, starting in late January and available worldwide through December 2018. Details will be provided soon on apple.com. (Editor’s note: After releasing this message, Apple announced that the discount is effective immediately and is available until the end of 2018.)

Early in 2018, we will issue an iOS software update with new features that give users more visibility into the health of their iPhone’s battery, so they can see for themselves if its condition is affecting performance.

As always, our team is working on ways to make the user experience even better, including improving how we manage performance and avoid unexpected shutdowns as batteries age.”

This is great news if you have an older iPhone and have noticed any loss of performance or decreased battery life. Anyone with an iPhone 6 or later is eligible for the $29 replacement, regardless of the results of Apple’s diagnostic testing. (If you purchased AppleCare+ coverage, it might even be free.) This isn’t just about improving battery life — tests have shown that replacing your iPhone’s battery can result in speed improvements of more than 100 percent.

How do you take advantage of this discount? To get your new battery, go to Apple’s support site, select iPhone, then Battery, then Battery replacement. If you live near an Apple Store or Apple Authorized Service Provider, select Bring in for repair, sign in with your Apple ID, select a location, and make an appointment.

For more information about Apple’s battery life and performance, refer to the following articles: